bug#66993: [PATCH] project.el: avoid asking user about project-list-file lock

[Dmitry Gutov]

On 15/11/2023 22:49, Spencer Baugh wrote:
> project--list is the new history variable.  Using it is mostly trivial;
> a small bit of work is necessary in project-prompt-project-name to get
> project-names for the history, but that worked out great.  Everything
> else just seems to work.
>
> And with savehist-mode enabled, project--list just gets stored
> automatically without any code in project.el.
>
> I can implement a backwards-compatible version if this seems like a
> reasonable direction to go in.

I haven't tried using it, but there's indeed a lot to like about this patch.

What happens if savehist-mode is nil, though? Which it is by default. 
For users with this setup the project history will just disappear.

What kind of backward compatibility did you have in mind?